In a new video, shot at Hyundai-Kia's Namyang test track, the company reveals that the new sedan has been engineered to complete the 0-100km/h run in 5.1 seconds. An earlier teaser filmed at the Nurburgring showed the car hitting a top speed of 241km/h.
Also used in the Genesis G80 Sport, the motor cranks out 272kW of power at 6000rpm, and 510Nm of torque between 1300 and 4500rpm.
For Genesis' sportiest sedan, drive is sent to the rear wheels via an eight-speed automatic.
Above: Kia GT spotted during development (view full spy photo set here).
An image leaked in late November from one of Kia's factories shows that the new rear-wheel drive sedan has styling derived from the 2011 Kia GT concept car, albeit missing the concept's suicide doors and frameless glass.
Under the skin, the new sedan will share its rear-wheel drive underpinnings with Hyundai's Genesis luxury marque.
In terms of market positioning and pricing, the new sedan will sit above the front-wheel drive Optima and Cadenza ranges, but below the full-size, luxury-oriented K900/K9 sold in select overseas markets.
Above: Kia GT factory leak.
The new Kia GT, or whatever it will be officially dubbed, is scheduled to have its unveiling on January 8 at the Detroit motor show.
Damien Meredith, Kia Australia's chief operating officer, has confirmed to CarAdvice that the new GT will available in Australia.
The GT should carry a sticker price within the $40,000 to $60,000 range when it becomes the local arm's first rear-wheel drive vehicle around the end of 2017.
MORE: Kia GT news